The mention of a "Black String Thong" points toward a persistent trend in the fashion industry: functional minimalism

: Small boutique manufacturers may use simple video clips (Mp4) to show the fit and movement of a garment like a string thong, as static images can sometimes fail to convey the "360-degree" look of minimalist designs. Digital Archives

: This is a standard digital multimedia container format (MPEG-4 Part 14). Its presence in the title indicates that the user is likely looking at a video file rather than a physical product description. The Digital Context